Any gas in high enough concentration can be deadly to humans, even oxygen. Some of the deadliest naturally occurring are:
Carbon dioxide
Carbon monoxide
Ozone
Clorine
Methane
Radon
chlorine gas
very dangerous
R 134 is freon gas. In small amounts, the exposure to freon gas is not dangerous. In larger amounts, freon can cause respiratory issues.
mustard gas tear gas poison gas
yes it is
its combustible
Farts
Yes, methane, a dangerous greenhouse gas.
Yes, it is dangerous to leave the pilot light out on a gas appliance as it can lead to a buildup of gas and potential fire or explosion hazards.
A fermi gas is a model from quantum mechanics first proposed by Fermi. A neutron star is said to be an example of a Fermi gas, and that would indeed be a dangerous place.
because that is the gas we release.
it is hot